[eagle]

By running the cleaner, you likely dislodged a bunch of crud into the radiator and thats why it got worse instead of better. I would say flush, flush, flush then install a filter/screen in the radiator top hose and run it. Clean the filter often until it stays clean. Probably the crud is loose in the radiator so flushing it should get it out without needing to rod it. I would DEFINITELY run 50/50 antifreeze, there is enough flaking cast iron in an A engine, you don't need to cause more by running straight water.